Set DJANGO_SETTINGS_MODULE on travis

Author: tobami

.travis.yml

@@ -8,6 +8,7 @@ branches:
 env:
   - DJANGO_VERSION=1.8.17
   - DJANGO_VERSION=1.9.12
+  - DJANGO_SETTINGS_MODULE=sample_project.settings
 install:
   - pip install flake8
   - pip install -q Django==$DJANGO_VERSION